connman: upgrade to 1.19

connman: upgrade to 1.19

Improvements:
- On startup keep interfaces already configured
with static IPv4 addresses if there is a
service configuration file containing
the very same static values. If not,
take the interface down and flush
the old configuration as before (Jukka Rissanen).
- Handle FallbackNameservers properly;
use them when no other nameservers have been
configured for a service (Patrik Flykt).

(From OE-Core rev: 2d0840780525e9a911e567f45b764850419d49f3)

Signed-off-by: Cristian Iorga <cristian.iorga@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>